This function controls the EEPROMs of individual ink tanks, the maintenance cartridge EEPROM, the EEPROM on the maintenance cartridge relay PCB, and the

head EEPROM in addition to the on-board EEPROM.

Motor control function

This function controls the carriage motor, feed motor, valve motor, spur motor, purge motor, cassette motor, lift motor, cutter motor and cutter lift motor based on

the input signals from sensors.

b) Driver IC (IC3101)

This IC generates a carriage motor control signal based on the control signal from the ASIC.

c) Driver IC (IC2801)

This IC generates feed motor and valve motor control signals based on the control signal from the ASIC.

d) Driver IC (IC2901)

This IC generates purge motor, cutter motor and spur motor control signals based on the control signal from the ASIC.

e) Driver IC (IC3001)

This IC generates a lift motor control signal based on the control signal from the ASIC.

f) Driver IC (IC3901)

This IC generates cutter lift motor and cassette motor control signals based on the control signal from the ASIC.

g) DIMMs (IC301,IC302,IC601,IC602,IC603,IC604)

The DIMM comprising a 128-MB DDR-SDRAM and a 128-MB SDR-SDRAM is connected to the 32-bit data bus to be used as a work area.

During print data reception, it is also used as an image buffer.

It cannot be expanded.

h) FLASH ROM (IC701)

A 16-MB flash ROM is connected to the 8-bit data bus to store the printer control program.

i) EEPROM (IC802)

The 128-KB EEPROM stores various setting values, adjustment values, log data, counter values related to the user/servicing.

MEMO:

After replacement of the main controller PCB, the printer must be started up in the service mode to take over the setting and adjustment values to the new PCB

properly (the service mode will be switched to the PCB replacement mode automatically).

2.4.3 Carriage Relay PCB

2.4.3.1 Carriage PCB components

0013-5072

IC 7

IC 6

IC 1

F-2-47

a) Latch ICs (IC1)

DI sensor reading control function

This function obtains the DI sensor value in the printhead and head rank for each color and sends it to the main controller PCB based on the control signals from

the main controller.

Environmental temperature reading control

This function sends the environmental temperature detected by the thermistor on the board based t the main controller PCB based on the control signals from the

main controller PCB.

Image data relay function

This function relays the image data from the main controller PCB to the printhead.

The function for processing image data is not supported.

b) Multi sensor control ICs (IC6 and IC7)

These ICs are used to generate the multi sensor LED control signal and adjust the gain.

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